tūn shì
tuō jiāng
qióng jiāng
tōng xiāo
qīn qī
zhāo lái
____
利用乘法公式计算:5002﹣499×501.
选答语。
①What's your name? ____ A. I'm from China.
②Where are you from? ____ B. He's my grandpa.
③Who's that man?____ C. My name is Tutu.
若顺次连接四边形ABCD各边中点所得四边形是矩形,则四边形ABCD一定是( )
下列生活现象中涉及到的物理知识分析正确的是( )